Cita APA (7th ed.)

Guthman, J. D. (1969). Metropolitan libraries: The challenge and the promise. American Library Association.

Cita Chicago (17th ed.)

Guthman, Judith Dommu. Metropolitan Libraries: The Challenge and the Promise. Chicago: American Library Association, 1969.

Cita MLA (9th ed.)

Guthman, Judith Dommu. Metropolitan Libraries: The Challenge and the Promise. American Library Association, 1969.